code: def test_short_header():
      """Check a short header"""
      with open(TEST_FILE_DXT5, "rb") as f:
          img_file = f.read()
  
      def short_header():
          with Image.open(BytesIO(img_file[:119])):
              pass  # pragma: no cover
  
      with pytest.raises(OSError):
          short_header()
  
imports: from __future__ import annotations
  from io import BytesIO
  import pytest
  from PIL import DdsImagePlugin, Image
  from .helper import assert_image_equal, assert_image_equal_tofile, hopper
label_desc: Use image node_id 17 for calling a global function with example usage: test_short_header() without return types